6.5.1.2 Old Native Pluggable Authentication

MySQL includes two plugins that implement native authentication;
that is, authentication based on the password hashing methods in
use from before the introduction of pluggable authentication.
This section describes mysql_old_password,
which implements authentication against the
mysql.user table using the older (pre-4.1)
native password hashing method. For information about
mysql_native_password, which implements
authentication using the native password hashing method, see
Section 6.5.1.1, “Native Pluggable Authentication”. For
information about these password hashing methods, see
Section 6.1.2.4, “Password Hashing in MySQL”.